You can thank your dad for letting the best sperm win and consider it "lucky" that your mom's prime egg was released in that same time frame. You were given the right combination to the lock.
Considering my lineage, it's amazing I can even string words together to make a sentence (sorry Mom and Dad)! :)
So, really, luck is just how well a particular being faired in the game of chance.
We could not say the world was lucky I was born, just that I was lucky I was born. In this case, luck is just a statement of amazement that, for once, chance went in my favor. When you consider luck in the same way a gambler views luck, you are making a statement about probability. If you wish someone good luck, you are implying that you or someone or something can control the outcome. Really, when you wish someone good luck, you are just saying, "I will be happy for you if chance happens to your advantage, "
although, I admit that does not sound as supportive as good luck.